I purchased a new MacBook Pro in late 2019. I have done a backup before, but admittedly it has been awhile, but there was no problem. This morning I plugged my Passport into the USB hub that is connected to one of my Mac’s thunderbolt connections. I get the message Time Machine couldn’t complete the backup to “Time Machine MacBook Pro”. Two of the disks to back up have the same name. Rename one of the disks named “Macintosh HD - Data”. I have removed one of the 2 disks that were showing. However, I am still getting the same message. I am running MacOS Catalina Version 10.15.5. Any suggestions? I really don’t want to have to buy another drive.
The drive was my backup for my last MacBook Pro.